Grinding-wheel-truing device



Aug. 14, 1923. 11,464,959 v. M. TUTHILL.

GRINDING WHEEL TRUING DEVICE Filed April 12, 1919 I flifaraeg g PatentedAug. 14, 1 923.

ICHIGAN-Y 1,; entree stares earner V 7 vrc'ron MLTUTHILL, or enannnnrrns', MICHIGAN, nssrenor. r zearnwrn, a ru rnrrna Bon'rron, or eaannBarr os, MICHIGAN, A CORPORATION or GRINDING-EVHEEL-{PBUING DEVICE.

Application filed Anril'lZ, 1919. Serial No. 289,723.

T 0 all iohomvit may concern Be it known th'at I, Vroron M. TUTHILL, a.citizen of the United Statesof America,

' residing at Grand'Rapids, in the county of Kentv and State ofMichigan, have invented ce'rtaiirnew' and useful Improvements inGrindingsW heelfTruing Devices; and I do 7 hereby declare the followingto be a full,

clear, andexact description of the invention,

I such as'will enableothers skilled in. the artto which itapper'tainstomalre and use the m '1 This invention relates to a grinding wheeltruing device for use in ,finishing grinding wheels and givingthe'surfaces of the same L any desired and varying degree of. coarseness. It is an object and purpose of the in vention to malre a device ofthis character which may be used for finishing either the face orperiphery of a grinding wheel, and also one which may be used forfinishing surfaces on a grinding wheel which may be located at an angleto each other, or COIICBJG surfaces, the construction of the devicebeing such that it may be held by the operator so as to reachpractically any part of the wheel desired and this irrespective of theparticular form of the edge of the grinding wheel, which may be ofconvex form, V-

shaped, or the. like.

For an understanding of the invention, reference may be had to thefollowing de scription taken in connectionwith the accompanying drawing,in which,

Fig. 1 is a plan of the device, and Fig. 2 is a fragmentary horizontalsection 7 through the device illustrating the method of rotatablymounting the rotating truing wheel of the device.

Like reference characters refer to like parts in the different views ofthe drawing. In the construction a spindle l is used between theends ofwhich a stop collar 2 is formed from which a cylindrical portion 3,

4 larger indiameter than the spindle 1 but i smaller than the collar,projects, a cone 1 joining it with an extension 1 of the spin- T dle,the end of which is threaded as india catedat 6. This spindlepassesthrough a 5 sleeve 7 one end of which is fo-rmed'with an enlarged head8, while the other end is threaded for the reception of an interiorlythreaded sleeve 9 which also has an enlarged head 10 similar to the head8. The sleeve is held on the first sleeve 7 by a set screw 11. Betweenthe heads 8 and 10 a wheel of emery or carborundum is located, sleeve 7passing therethrough, and by moving the sleeve 9 along sleeve 7 so as tobring head 10 against one side of the wheel, the other .side bearingagainst the head 8, a substanmakes a rotatable mount for the sleeve 7and attached wheel 12, using cone bearings. A lock nut 15 is used tohold the cone nut 13 in place. In securing the wheel 12 between theheads 8 and 10 it is desirable to interpose paper washers 16, as shownand in practice this is done.

The spindle 1 at the end opposite to the threaded end 6 is adapted to beconnected to a handle member comprised of two arms 17 and 18 located atsubstantially right angles to each other. The axis of the spindle is inpractical alinement with the center line of arm 17, and the end of thespindle is inserted into an opening bored or otherwise formed in the endof arm 17, being held in place by a set screw 19. Each of the arms 17and 18 terminate at their outer ends in balls 20 of convenient size foran operator of the tool to grasp in his hands.

With this device, the operator bring -the wheel 12 into peripheralcontact with the periphery of a larger grinding wheel, and if the axesof the two wheels are parallel so that both wheels turn with the sameperipheral speed, the surface of the grinding wheel is given acomparatively coarse grinding surface. If so located that the axis ofthe wheel 12 is at an angle to the axis of the grinding wheel, the wheel12 turns at a less peripheral speed than the larger grinding wheel, thegrinding surface made is finer, the degree of fineness being dependenton the different angles of location of the two wheels. The formation ofthe handle member also permits the operator to use the wheel 12 againstthe sides of the grinding wheel; or in case the periphery of thegrinding wheel is V-shaped or is of con handle member. who uses thisdevice does not have to bring vex form, or of other forms than straightacross, it is possible to use the device against any partof the Wheel.due to the form of the ltloreover, the operator any part of his body infront of the grinding WheeL but may nosition himself Wholly to one side,this b flowlne from the construction and mounting of then heel on thehandle member. All of these features combine to make the device one of pactical merit and value.

Of course, man triations in the angle that the arms 17 and lbmake witheach other may beresorted to Without changing t rein ention so lone asthe whee is placed nection to'each other, aspindle projecting a featureof sat ety from the handle member in alineinent with one of the arms,and a Wheel rotatably' mounted on the spindle close to the handlemember.

2. In combination, a handle member comprising two arms connectedtogether adjacent one end of each arm, andlocated at an angle to eachother aspindle attached to the handle member and extending there from,and a wheel rotatabl mounted on the spindle close to the handle member,said handle member hzwinn both arms thereof located to one side of theWheel.

in combination, a handle member com prised out two arms connectedtogether and locatedat an angle to eaehgother, a spindle.

detachably connected to and projecting" from the hand member.

member, substantially as described.

In testimony whereof Iafhx my signature.

' vlcron M. TUrniLL.

a Wheel rotatablj, mounted on the spindle close to the handle member,With the arms of said handlen em ,ber located at one side of the heel,and means for fixing-the spindle on the handle

